In our second partnership with One Acre Fund, we’ll be following David and Zipporah, smallholder farmers from Kenya, for a whole growing season. From planting to harvest, we will check in every month ...
A solar day lamp is a simple, inexpensive device for bringing “daylight” to dark interior spaces whenever the sun is shining. This article provides complete instructions for designing lamps using both ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback